1. National High Magnetic Field Laboratory Geochemistry Group and Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, Florida 32306, United States
2. U.S. Geological Survey, Water Mission Area, Boulder, Colorado 80303, United States
3. Department of Environmental Toxicology, University of California Davis, Davis, California 95616, United States
4. National High Magnetic Field Laboratory Ion Cyclotron Resonance Facility, Tallahassee, Florida 32310, United States